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builtin-apply: keep information about files to be deleted

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Example correct diff generated by `diff -M -B' might look like this:

	diff --git a/file1 b/file2
	similarity index 100%
	rename from file1
	rename to file2
	diff --git a/file2 b/file1
	similarity index 100%
	rename from file2
	rename to file1

Information about removing `file2' comes after information about creation
of new `file2' (renamed from `file1'). Existing implementation isn't able to
apply such patch, because it has to know in advance which files will be
removed.

This patch populates fn_table with information about removal of files
before calling check_patch() for each patch to be applied.

Signed-off-by: Michał Kiedrowicz <michal.kiedrowicz@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michał Kiedrowicz 2009-04-11 21:31:00 +02:00 committed by Junio C Hamano
parent d8c81dfcaf
commit 7fac0eef91
2 changed files with 47 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
builtin-apply.c
View File

@ -2271,6 +2271,25 @@ static struct patch *in_fn_table(const char *name)
return NULL;
}
/*
* item->util in the filename table records the status of the path.
* Usually it points at a patch (whose result records the contents
* of it after applying it), but it could be PATH_WAS_DELETED for a
* path that a previously applied patch has already removed.
*/
#define PATH_TO_BE_DELETED ((struct patch *) -2)
#define PATH_WAS_DELETED ((struct patch *) -1)
static int to_be_deleted(struct patch *patch)
{
return patch == PATH_TO_BE_DELETED;
}
static int was_deleted(struct patch *patch)
{
return patch == PATH_WAS_DELETED;
}
static void add_to_fn_table(struct patch *patch)
{
struct string_list_item *item;
@ -2291,7 +2310,22 @@ static void add_to_fn_table(struct patch *patch)
*/
if ((patch->new_name == NULL) || (patch->is_rename)) {
item = string_list_insert(patch->old_name, &fn_table);
item->util = (struct patch *) -1;
item->util = PATH_WAS_DELETED;
}
}
static void prepare_fn_table(struct patch *patch)
{
/*
* store information about incoming file deletion
*/
while (patch) {
if ((patch->new_name == NULL) || (patch->is_rename)) {
struct string_list_item *item;
item = string_list_insert(patch->old_name, &fn_table);
item->util = PATH_TO_BE_DELETED;
}
patch = patch->next;
}
}
@ -2304,8 +2338,8 @@ static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *
struct patch *tpatch;
if (!(patch->is_copy || patch->is_rename) &&
((tpatch = in_fn_table(patch->old_name)) != NULL)) {
if (tpatch == (struct patch *) -1) {
(tpatch = in_fn_table(patch->old_name)) != NULL && !to_be_deleted(tpatch)) {
if (was_deleted(tpatch)) {
return error("patch %s has been renamed/deleted",
patch->old_name);
}
@ -2399,10 +2433,9 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s
assert(patch->is_new <= 0);
if (!(patch->is_copy || patch->is_rename) &&
(tpatch = in_fn_table(old_name)) != NULL) {
if (tpatch == (struct patch *) -1) {
(tpatch = in_fn_table(old_name)) != NULL && !to_be_deleted(tpatch)) {
if (was_deleted(tpatch))
return error("%s: has been deleted/renamed", old_name);
}
st_mode = tpatch->new_mode;
} else if (!cached) {
stat_ret = lstat(old_name, st);
@ -2410,6 +2443,9 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s
return error("%s: %s", old_name, strerror(errno));
}
if (to_be_deleted(tpatch))
tpatch = NULL;
if (check_index && !tpatch) {
int pos = cache_name_pos(old_name, strlen(old_name));
if (pos < 0) {
@ -2471,6 +2507,7 @@ static int check_patch(struct patch *patch)
const char *new_name = patch->new_name;
const char *name = old_name ? old_name : new_name;
struct cache_entry *ce = NULL;
struct patch *tpatch;
int ok_if_exists;
int status;
@ -2481,7 +2518,8 @@ static int check_patch(struct patch *patch)
return status;
old_name = patch->old_name;
if (in_fn_table(new_name) == (struct patch *) -1)
if ((tpatch = in_fn_table(new_name)) &&
(was_deleted(tpatch) || to_be_deleted(tpatch)))
/*
* A type-change diff is always split into a patch to
* delete old, immediately followed by a patch to
@ -2533,6 +2571,7 @@ static int check_patch_list(struct patch *patch)
{
int err = 0;
prepare_fn_table(patch);
while (patch) {
if (apply_verbosely)
say_patch_name(stderr,

2
t/t4130-apply-criss-cross-rename.sh
View File

@ -31,7 +31,7 @@ test_expect_success 'diff -M -B' '
'
test_expect_failure 'apply' '
test_expect_success 'apply' '
git apply diff
'